Hello,
Please see the code I have send in attachment.
Any suggestions will highly appreciate.
Thanks and Regards,
Gopal
-----Original Message-----
From: Grant Edwards [mailto:inva...@invalid]
Sent: Wednesday, January 07, 2009 8:58 PM
To: python-list@python.org
Subject: Re: Multiprocessing takes higher execution time
On 2009-01-07, Steve Holden <st...@holdenweb.com> wrote:
>> I use multiprocessing to compare more then one set of files.
>>
>> For comparison each set of files (i.e. Old file1 Vs New file1)
>> I create a process,
>>
>> Process(target=compare, args=(oldFile, newFile)).start()
>>
>> It takes 61 seconds execution time.
>>
>> When I do the same comparison without implementing
>> multiprocessing, it takes 52 seconds execution time.
> My first suggestion would be: show us some code. We aren't
> psychic, you know.
I am!
He's only got one processor, and he's just been bit by Amdahl's
law when P<1 and S<1.
There you have a perfectly "psychic" answer: an educated guess
camoflaged in plausible-sounding but mostly-bullshit buzzwords.
A better psychic would have avoided making that one falsifiable
statement (he's only got one processor).
--
Grant Edwards grante Yow! Hello. Just walk
at along and try NOT to
think
visi.com about your INTESTINES
being
almost FORTY YARDS LONG!!
The oldProjects and newProjects will contains zip files
i.e(oldxyz1.zip,oldxyz2.zip, newxyz2.zip,newxyz2.zip)
it will unzip both the zip files and compare all the files between old and new
(mdb files or txt files) and gives the result.
I do this comparision for n number set of zip files and i assigne each set of
zip files comparision to a process.
class CompareProjects(dict):
"""
Compares the set of projects(zip files)
"""
def __init__(self, oldProjects, newProjects, ignoreOidFields, tempDir):
self.oldProjects = oldProjects
self.newProjects = newProjects
def _compare(self, tempDir, ignoreOidFields):
"""
Compares each project
"""
projects =
set(self.oldProjects.keys()).union(set(self.newProjects.keys()))
progress.totalProjects = len(projects)
progress.progress = 0
que = Queue()
for count,project in enumerate(projects):
oldProject = self.oldProjects.get(project) if project in
self.oldProjects else None
newProject = self.newProjects.get(project) if project in
self.newProjects else None
prj = '_'.join((os.path.basename(oldProject)[:-4],
os.path.basename(newProject)[:-4]))
cmpProj = CompareProject(oldProject, newProject, ignoreOidFields,
tempDir)
p = Process(target=cmpProj._compare, args=(os.path.join(tempDir,
prj), ignoreOidFields, False, project, que))
p.start()
print 'pid>>',p.pid
while progress.totalProjects != len(self):
if not que.empty():
proj, cmpCitect = que.get_nowait()#get()
self.__setitem__(proj, cmpCitect)
progress.progress += 1
else:
time.sleep(0.001)
class CompareProject(object):
"""
compares two projects
"""
def __init__(self, oldProject, newProject, ignoreOidFields, tempDir,
unitCompare = False):
self.oldProject = oldProject
self.newProject = newProject
def _compare(self, tempDir, ignoreOidFields, unitCompare, project=None,
que=None):
"""
Compares the extracted .mdb files and txt files
"""
oldProjectDir = os.path.join(tempDir,'oldProject')
newProjectDir = os.path.join(tempDir,'newProject')
# get .mdb files and txt files from the project
oldmdbFiles,oldTxtFiles = self.getFiles(self.oldProject, oldProjectDir)
newmdbFiles,newTxtFiles = self.getFiles(self.newProject, newProjectDir)
#start comparing mdb files and txt files
self.comparedTables = ComparedTables(oldDbfFiles, newDbfFiles,
ignoreOidFields, tempDir)
self.comparedTxtFiles = ComparedTextFiles(oldTxtFiles, newTxtFiles,
tempDir)
if que and project:
que.put_nowait((project, self))
class ComparedTables(dict):
"""
This class compare two mdb files and it each tables and gives the results
"""
........
class ComparedTextFiles(dict):
"""
This class compare two txt files line by line and give the diff results
"""
..........--
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